REFRIGERANTS
tion in the European Union. By using RS-53, users can continue to utilise their existing R-410A equipment, avoiding the expense of replacing it with new systems designed for alternative refrigerants like R32, which is fl ammable and not suitable for all applications.
■ The patent for the refrigerant blend that became R-470A (RS-53) has been fi led internationally. For instance, the European Patent Offi ce lists an application number EP3825381A1 with a fi ling date of 2019-07-08. The inventors are listed as John Edward Poole and Richard Powell.
Although some implications are inaccurate, the patent details are correct. Sounded fi ne, until the search was repeated, producing the following script.
RS-53, also known as R470A, is a patented HFO blend
refrigerant used as a replacement for R410A in various air conditioning and refrigeration applications. Here’s what the search results tell us about the patent status:
■RS-53 (R470A) is described as a “new, patented HFO blend”. ■ComStar International Inc. manufactures and imports this patented refrigerant.
■ Patent application numbers related to “low GWP refrigerant blends” that could encompass RS-53 have been identifi ed, including a WIPO PCT application and national applications in various countries.
■A specifi c US patent, US9200189B2 - “Refrigerant gas composi- tion,” assigned to Eco D’Gas AS, Norway, has been granted and is still in eff ect based on maintenance fee payments. In essence, while the specifi c patent number directly corresponding to the “RS-53” designation may require further investigation, there’s evidence that the refrigerant blend is patented and its development is associated with companies like ComStar International Inc.. AI responses may include mistakes. Learn more
The most obvious mistake is associating RS-53 with the US patent 92001189B2. A further repeat search, not copied here, indicated that a
large company had denigrated RS-53 as a replacement for R410A, referencing the company’s website as the source. Yet a close reading of the site found no such statement. AI had interpolated its own incorrect opinion.
So what have we learnt? ■ A simple AI search for RS-53 provided a reasonable report on its applications and merits. Links to RS-53 literature contain- ing details about its thermodynamic and other properties were provided, although omitted from this article.
■ Repeated searches can produce diff erent results. Although this in itself is not surprising, it can lead to searchers being given incorrect product information.
■ Google AI deduced that RS-53 is patented, but in one search, it gave the wrong patent. This is concerning for companies that rely upon strong IP to underpin their businesses.
■ In one search, Google generated an adverse report that did not exist in the source quoted.
■ Take seriously the statement, ‘AI responses may include mistakes’!
If you want to be properly informed about RS-53 and other
RS-products, including how to purchase them, forget AI – go directly to the RSL online site or look for RSL adverts in ACR News.
Although I have been less than impressed in this instance,
I’m not anti-AI. I’ve recently found that Google Gemini is good for solving coding problems. But my message is that HVAC companies, and others, should check how AI might be using and perhaps misrepresenting their information.
Indeed, AI- generated images have been reported as being very similar to the originals, presumably because they were in the data trawl used to train the AI. The question I’m posing here is whether the HVAC industry needs to be worried about misuse of its published information.
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www.acr-news.com • September 2025 27
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